Antwoord:
Oplossing: # x = 3, y = 43, z = -19 #
Uitleg:
# 4x + y + 5z = -40 # (1)
# -3x + 2y + 4z = 1 # (2)
# x-y-2z = -2 # (3) #:. y = x-2z + 2 #
putting # y = x-2z + 2 # in equaion (2) & (3) krijgen we, # 4x + x-2z + 2 + 5z = -40 of 5x + 3z = -42 # (4) en
# -3x + 2 (x-2z + 2) + 4z = 1 of -x = 1 -4:. x = 3 #
putting # X = 3 # in vergelijking (4) krijgen we # 5 * 3 + 3z = -42 #
of # 3z = -42-15 of 3z = -57 of z = -19 #
putting # x = 3, z = -19 # in vergelijking (1) krijgen we, # 4 * 3 + y + 5 * (- 19) = -40 of y = -40-12 + 95 = 43 #
Oplossing:# x = 3, y = 43, z = -19 # Ans
